Minor changes
Automatically load css files for module
Catch non-existing css folder
Add correct error handling on empty modules directory
Use correct ticks for styles
[twitter] Use api to load fontawesome icon
Use CSS file to style twitter
Add theme selector, close #51
Correct cover theme
Add img for cover theme
Properly load theme, add generall.css for general style issues
Merge branch 'master' of github.com:MrOerni/trickle into rss